Sleeve valve engine



Feb. 7,1933. A. M. NlvEN SLEEVE VAL-VE ENGINE Original Filed Sept. 28, 1927 n 17:1. it: rl

A TTORNE Y.

Patented 7, 1933 UNITED sTA'rEs PATENT OFFICE AROHIE MAOPHAIL NIvEN, OF DETROIT, MICHIGAN,y AssIGNoR To yCONTINENTAL MOTORS CORPORATION, OF DETROIT, MICHIGAN, A CORPORATION or VIRGINIA sLEEvE `VALVE ENGINEI Original application med september 2s, 1927, serial 110.222,499. Divided aria this appiieation med MarchVK 11, 19539.A Serial No. 345,983;

This invention'is a division of my copending application Serial No. 222,499, filed September 28,1927, and relates to internal' combustion engines and refers more particularly to the sleeve valve type of engine ordinarily known as the Burt-McCollum engine, in which a single sleeve valve is given a combined reciprocating and'oscillating movement in controlling the engine intake and eX- haust;k In this type of engine it is customary to locate the sleeve valve between the working piston and the cylinder, the end of the sleeve remote from the engine crankshaftr ordinarily moving in a sleeve pocket formed by a cylinder head projecting inwardly of the cylinder and spaced therewithin. Thereciprocating movement ofthe sleeve within the sleeve pocket heretofore caused the gases entrapped therein to be compressed and ei:- panded resulting in undue irregularitles 1n the movement of the sleeve valve operating mechanism; inducing leakage of gases relatively between the combustion chamber and cylinder ports; and tending to pump lubrieating oil into the sleeve pocket.

One ofthe objects of my invention resides in the provision of simple and eflicient means for balancing the pressures of the sleeve pockets in a multi-cylinder engine by interconnecting the sleeve pockets with a common pressure equalizing manifold. This equalizing manifold may be connected to suction means such as the engine oil pump or intake manifold assisting in the equalization of the *y pressure in the sleeve ockets `and also serving to withdraw there rom any accumulation of lubricating oil or other deposlts which might otherwise become entrapped and burned leaving objectionable residues including a deposit of carbon.

With these and other objects in view the invention consists in the novel combination and arrangement of parts more particularly hereinafter described and claimed.Y

With reference to the accompanying drawing in which like reference characters illustrate corresponding parts,

Fig. l is a perspective elevation view of the engine, a section being taken transversely 50 through a typical cylinder and illustrating somewhat diagrammatically one embodiment of my sleeve pocket pressure equalizing device and sleeve pocket deposit removal device, and s Fig.V 2 is a fragmentary view of a modified form of manifolding for-the pressure equalizing and deposit removing.v n

In the drawingreference character A represents the' enginercomprising one or more cylinders 10 closed at one end by ac linder head llpro'jecting within the cylin er and spaced therefrom to 'form a sleeve valve pocket 12. Between' piston 13 and cylinder 10 is'loc'ated one or more of the' well known types of sleeve valves, thel illustration com-l prising a single sleeve valve 14 provided with intake and exhaust ports 15 and r16 respectivelycooperating with cylinder intake and eXhaust ports -17 and 18 in controlling `the cyclic events of the engine. The sleeve valve y0 14 may be given a combined reciprocating and oscillating movement with respect to the cylinder and sleeve'axes in a well known manner whereby a point on the sleeve valve moves' parts thus far-,described are well known in the art. Y Y e In order to overcome the yaforesaid disadvantages due to the movement of the sleeve valve in the pocket 12 I have provided a sleeve valvefpocket equaliz'ing vmanifold v19 having branches 20 registering with the cylindery passages -or ports 21 which respectively oommunicate with-the sleeve pockets 12of the various cylinders y10,-preferably at or near the outer ends of thesleeve pockets so that i the sleeve valves 14 lwill not `cover ythe passages 21 at the outer extreme position of their movement. By reason of the inter-connec-V tion` ofthe sleeve4 pockets through the manifold 19 the pressures in the variouspockets 12will, 'at all times be equalized. Due to the timingo'f the engine the various sleeve valves "willbein diiferent relative positions ata given time so that when one sleeve 14 is moving outwardly in the pocket 12, for example,

another sleeve moving inwardly at this time will be subjected to the same pressure from its sleeve pocket 12. The equalization of pressures in the sleeve pockets produces a 5 better gas seal and a more even valve operating movement as aforesaid.

If desired, the manifold 19 may be connected through pipe 22 with a suction device such as the usual'engine oil lpump 23. The

pump outlet 24 may lead to t e usual engine bearings with an intake 25 connected to the crank case oil supply 26. Thus the equalization of the sleeve pockets is facilitated by the pump 23 and lubricating oil and other de` posits will be withdrawn from the sleeve pockets into the manifold 19 whence they will be conducted tothe crankcase by the suction pipe 22.

Referring to Fig. 2, instead of connecting 20., the equalizing manifold with the suction of A an oil pump as vin Fig. 1, I have provided a suction trap 27, suction being produced in the trap preferably by a connection 28 with the intake manifold 29. The trap 27 is consnected by suction pipe 22a with equalizing 'manifold 19. The trap 27 serves to catch the oil and other deposits removed from the sleeve pockets 12, such accumulated oil and residue indicated at a level 30 being drained 31% into the crankcaserf desired by a return 4pipe 31. A valve 32 is normally seated by a spring 33 which, however, will be compressed under a predetermined weight of accumulated oil in the trap, thus permitting :the residue to periodically drain into the A crankcase. If desired a valve 34 may be provided in the passage 28, a valve spring 35 permitting unseating of the valve whenever predetermined amount.

If the equalization of the sleeve pockets is desired to be dispensed with, the suction passages 21 may be independently connected with the suction producing means, thus utilizing the device solely for sleeve pocket deposit removal as will readily be understood.

What I claim as my invention is:

1. A sleeve valve `internal combustion engine comprising in combination, a plurality of cylinders each having reciprocable sleeve valve meansand a sleeve valve pocket receiving one end of the sleeve valve means, a sleeve valve pocket pressure equalizing manifold, means establishing communication between the manifold and sleeve valve pockets, an oil pump, and a conduit connecting said pressure equalizing manifold with the intake of said pump.

2. A sleeve valve internal combustion engine comprising in combination, a plurality of cylinders each having reeiprocable sleeve valve means and a sleeve valve pocket receiving one end of the sleeve valve means, a sleeve valve pocket pressure equalizing manifold, means establishing communication between the suction in the intake manifold reaches a.

the manifold and sleeve valve pockets, an oil pump, a conduit connecting said pressure equalizing manifold with the intake of said pump, a supply of lubricating oil, means establishing communication between the oil supply and the intake of said pump, and a conduit for conducting oil from the pressure side of the pump to the engine bearings.

3. A sleeve valve englne comprising in combination, a cylinder, sleeve valve means,

a piston, a sleeve pocket structure, an oil pump, and a conduit connecting the sleeve pocket with the oil pump suction for extract-V ing deposits from said sleeve pocket.

4. A sleeve valve engine comprising a plurality of cylinders each provided with sleeve valve means and a pocket structure receiving the sleeve valve means, an equalizer manifold communicating with the sleeve pockets of said cylinders, an oil pump, and a conduit connecting said equalizer manifold with the oil pump suction.

In witness whereof, I hereunto subscribe my name this 8th day of March, A. D. 1929.

ARCHIE MACPHAIL NIVEN. 

